| 两个锰的18-氮杂金属冠醚-6配合物的合成、晶体结构和磁性质研究(英文) |
| Syntheses, Crystal Structures and Magnetic Property of the Two Mn(Ⅲ) 18-azaMetallacrown-6 Complexes |
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| 摘要: 以负三价、五啮的N-乙酰水杨酰肼(ashz3-)作为配体,合成了二个大环六核氮杂金属冠醚[MnⅢ6(ashz)6(MeOH)6]·6MeOH (1)和[MnⅢ6(ashz)6(DMF)6]·3DMF (2)。晶体学数据是:配合物1,三方晶系,空间群R3,a=b=24.806(2),c=11.260(1)?,Z=3,μ=1.007mm-1,R=0.0572,wR=0.1142;配合物2,三方晶系,空间群R3,a=b=26.629(3),c=23.298(4)?,Z=6,μ=0.856mm-1,R=0.0671,wR=0.1661。这两个配合物属18-氮杂金属冠醚-6结构类型,冠醚分子具有晶体学C3i对称性。配体ashz3-通过它的肼基的N-N桥连金属原子,从而形成有中央空穴的六核锰的大环配合物。变温磁化率(4～275K)研究表明,配合物1中金属离子间存在着反铁磁性耦合。 |
| 关键词: 金属冠醚 锰 水杨酰肼 晶体结构 磁性质 |
| 基金项目: |
| Abstract: Two macrocyclic hexanuclear azaMetallacrowns, [MnⅢ6(ashz)6(MeOH)6]·6MeOH (1) and [MnⅢ6(ashz)6(DMF)6]·3DMF (2), were prepared using a trianionic pentadentate ligand N-acylsalicylhydrazide (ashz3-). The crystal data are trigonal R3, a=b=24.806(2), c=11.260(1)?, Z=3, μ=1.007mm-1, R=0.0572, wR=0.1142 for complex 1 and trigonal R3, a=b=26.629(3), c=23.298(4)?, Z=6, μ=0.856mm-1, R=0.0671, wR=0.1661 for complex 2. They are of 18-azametallacrown-6 structure type. The metallacrown molecules in two title complexes have a crystallographic C3i symmetry. The triple-deprotonated ligand ashz3- in the title complexes bridges the metal ions by a hydrazide N-N group, forming a hexanuclear manganese metallmacro-cycle with a cavity in the center. The magnetic susceptibility (4～275K) study indicates that there is an antifer-romagnetic exchange interaction in the title compound 1. CCDC: 192835(complex 1); 192836(complex 2). |
| Keywords: metallacrown manganese salicylhydrazide crystal structure magnetic property |
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| 林深,刘世雄,林碧洲.两个锰的18-氮杂金属冠醚-6配合物的合成、晶体结构和磁性质研究(英文)[J].无机化学学报,2002,18(12):1205-1210. |
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